I do believe in miracles. but I believe it is all according to his will..He doesn't choose to heal everyone and it isn't because of a lack of faith or because of their sin. I know faithful people who truly love the Lord who have not been healed..
One thing I always wonder about is..If you believe that God can heal everyone, if they have enough faith and little sin (we all will sin until the day God takes us home) Why then do people die..We will not be cured of whatever we die from. We will not live forever. The only thing that can keep us from experiencing physical death is the Rapture. Every time someone dies, does it mean they had little faith? I don't think so.
I think many of these healers are not telling of the times that healing didn't work.
Just food for thought